Transcription transducers

These are not lexical transducers, instead they convert between one representational format and another, like between dates written as text and dates written with digits. For this type of transducers there is a separate basic transducertype: transcriptor. The application name specifies what type of transcription is being done by the transducer, and the direction is specified using either digit2text or text2digit.

Possible application names are:

date

clock

number

Conversion to IPA is a variant of this type of transducers, and is named:

text2ipa

Since no tags are involved in these types of transducers, the tagset is left out.

The transcriptors are sometimes filtered (i.e. some forms are excluded inone direction or the other) and that is indicated by a suffix .filtered. And because of the issues with Xerox
lookup, whether the fst is intended for lookup or composition is also indicated by a suitable suffix.